title: Double pathology as a cause of occult gastrointestinal blood loss.
mesh_terms: D000230:Adenocarcinoma / Q000150:complications; D000368:Aged; D002430:Cecal Neoplasms / Q000150:complications; D003110:Colonic Neoplasms / Q000150:complications; D004381:Duodenal Ulcer / Q000150:complications; D005260:Female; D005756:Gastritis / Q000150:complications; D006471:Gastrointestinal Hemorrhage / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009780:Occult Blood